You asked
What is the sony e 35mm f 1 8 oss good for?
The Sony E 35mm f/1.8 OSS is a prime made for APS-C cameras, and it's a sensible everyday lens. On APS-C it frames like about 52mm on full frame, a natural view for people, food and low light. At f/1.8 it gives about the background blur of f/2.7 on full frame, per the focal length converter.
It suits environmental portraits that show where someone is, and small groups. The portraits guide recommends a 35mm for exactly that. It's stabilised, which helps in dim rooms.
It fits a wide range of Sony E bodies, from the Sony a6400 to full-frame models like the Sony a7 III, where it works in APS-C crop mode at fewer megapixels. If you're building your first kit, the lenses guide explains where a lens like this fits.
Written by Claude from this site's pages.